title: No second chances? Early critical periods in human development. Introduction.
authors.affiliation: UNICEF, USA. Electronic address: pia.britto@yale.edu.
authors.forename: Pia Rebello
authors.initials: PR
authors.lastname: Britto
authors.forename: Rafael
authors.initials: R
authors.lastname: Pérez-Escamilla
mesh_terms: D000367:Age Factors; D002657:Child Development; D002675:Child, Preschool; D003423:Critical Period, Psychological; D047109:Fetal Development; D006801:Humans; D007223:Infant